Table 2. .

Image Quality Assessment Results for Original and HDR Processed Images

	SNR (dB)			CNR (dB)
	Original	HDR Processed	Diff	Original	HDR Processed	Diff
Cirrus (N = 124)	26.20 (26.12, 26.28)	20.94 (20.85, 21.03)	−5.27 (−5.30, −5.24)	2.80 (2.59, 3.01)	3.07 (2.80, 3.34)	0.27 (0.2−0.33)
RTVue (N = 145)	20.81 (20.75, 20.88)	19.12 (19.10, 19.17)	−1.69 (−1.72, −1.66)	2.73 (2.64, 2.82)	2.90 (2.81, 2.99)	0.17 (0.16, 0.18)
Overall (N = 269)	23.30 (22.97, 23.63)	19.96 (19.84, 20.10)	−3.34 (−3.56, −3.12)	2.76 (2.66, 2.87)	2.98 (2.85, 3.11)	0.21 (0.18, 0.24)

Diff: SNR or CNR difference between the original and the HDR processed. SNR showed statistically significant decrease after HDR imaging (P < 0.0001, paired t-test) while CNR showed statistically significant improvement after HDR imaging (P < 0.0001, paired t-test). 95% CI for each measurement is shown in the parentheses.